Power steering fluid substituted with ATF? - Mercedes-Benz Forum
 
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#1 (permalink) Old 12-24-2010, 08:32 PM
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Power steering fluid substituted with ATF?

Have anyone heard of using transmission fluid in lieu of power steering fluid? A mechanic told me that transmission fluid can be used as power steering fuid?
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#2 (permalink) Old 12-24-2010, 09:12 PM
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Toyota uses ATF as PS fluid but that was specified by Toyota. They use ATF in their manual transmission too.
But I don't think you want to do that for your MB.
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#3 (permalink) Old 12-25-2010, 09:41 AM
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Yes, you can and it doesn't really matter, however, why not use the right stuff. It's not like you are using it as fuel at $3.50 a gallon.

Mike

I don't downshift often, but when I do, it is next to a Prius so I can show them how I am hurting the environment! -

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#4 (permalink) Old 12-25-2010, 10:23 AM
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It may make a difference in cold countries..
(I am not even sure of that.)
I have been using it
for years.
Why pay more?

Regards,
aam.
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#5 (permalink) Old 12-25-2010, 08:53 PM
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Aam
Exactly how much are you using that price would matter? Do you have a leak?
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#6 (permalink) Old 12-25-2010, 08:58 PM
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Yes, you can use ATF, but to achieve the best corrosion protection, use specific MB fluid, it is very inexpensive...

Garage:

Mercedes-Benz, W140 S Class S320 (AKA 300SE)

Mercedes-Benz, R230 SL Class SL55 (///AMG)

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Mercedes-Benz, W163 ML Class ML430 (Designo Edition)

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#7 (permalink) Old 12-25-2010, 10:04 PM
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Thanks everyone,

I had a leak of Power steering fluid and fixed it. (tube between resorvoir and pump). I had used the transmission fluid as PSF in past and wanted to continue using it because I did not notice any problems with it in the past. Just wanted to know if anyone had any suggestion as to whether or not I was doing something that could cause problem down the road.
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#8 (permalink) Old 12-26-2010, 12:32 PM
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Quote:
Originally Posted by 4benzes View Post
Aam
Exactly how much are you using that price would matter? Do you have a leak?
Yes I did....
I have posted it, in the past.

The return lines are pron to leaks, cheap repair hard to locate, and little space to work.

There are two small hoses that you buy by the meter, I think it was 10mm.
you only need about 18" but at $6 ???
Replace the filter while you there.

The one is almost strait so it lasts longer, the other is like a pig tail, you need that shape because of engine movement.

With time it drys and leaks at the clamps.
Especially when the engine mounts are old/loose.

But what is easy work on our cars? Haha.

If you have to do this work, pay attention to the clamp position, so you can tighten them from the top.
You will also need a very long Philips screwdriver, or & 1.4 ratchet with long extensions etc.

Yes you will have oil all over the place, so be prepared.
Send the wife to visit her mother, (long visit...)

It will be much, much, easier for you. Haha.

Regards,
aam.

PS.

About using tranny fluid, in power steering.
I am talking for the ball recirculation type power steering.

If there are no leaks, the $15 MB is not important so do get it.
But lets say that you are away/leaks and you need it, don't run it dry.

Don't forget to periodically tighten the three bolts on the gear box, or it will leak.

Last edited by aam; 12-26-2010 at 12:43 PM.
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#9 (permalink) Old 12-27-2010, 10:32 AM
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I quit substituting fluids about 15 years ago when the main ram seal failed suddenly on my floor jack and the car fell. fortunately no one was underneath when it happened. When I took the seal to a repair place to get a new one the person looked at it and said you can not use power steering fluid in floor jacks it deteriorates the seals. There is a GOOD reason that they use specific fluids for specific systems.
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